Centrifugal separator.



No. 834,018. 'f PATBNTED OT, 2s, 190e. v l P. K.'NIBLSBN. GBNTRIFUGAL,SBPARATQR` APPLICATION FILED 0OT.14, l905.-

jjZ/lkz'wz,

v Inventor.

Attorneys vby V' f if Persan. NmLsnnoF MINNEAPOLIS; MINNESOTA.

' CEN-ramos sal'Armrola.'

ne. enfasis.

specificaties or Letten Patent.

Patented Oct. 28, 41906.

, ippseonmaotabgr 14.11905. sem iro. zsaaos.

. To (tt wil/mrt. it #my itknown that I, PETER K.

neapolis, in the county of Hennepin andState of Minnesota, have inventeda new and useful Centrifugal Separator, of which the following aspecification. i

invention relates to centrifu al separators, and is 4particularly desifor the separation of cream from whole?- lmachines of thischaracter itis customary to employ .a series of superimposed rings or partitions,usually frustums of cones, arrangedl concentrically lwithin the liquid-sace of the Y' dating bowl and around a centra feed-tube :id crossing.thef radial lines ofthe bowl.

i' condition.

llo. these and .other objects in view the ent linvention consists in thecombinand arrangement of parts, as will be here meer. more fullydescribed, .shown in the acnipanyi I drawings, andparticularlypoint-krthe appended claims, it vbeing uni minor details may be made within icopent the claims without departing from se invention. V p v he drawings,Fi u re 1 is a view of a cenaliseparator em odying the features of entinvention, the bowlbeing in sec- 'id other portions'broken away toillusassemblage of. the parts. of the de.` Eig. gis an enlargedfragmentary seccw of one of the se arating dev1ces in .ve condition. E

sisma, t] citizen of thelUnited States, residingl at.M1n

milk. In

hen a series of separating devices of this raster are connected to forma single comdevices 'are the eiiective cleansing of the device, any tomaintain the apparatus 1n a same toed that changes in the form,proportion,

spirit or sacrificing any ofthe advantagesl ig. 3 -1s a similar e.separating` device removed'from v a n e l ,the ,inner helix'is rovided u.raster of reference designate"cor`"' mi; natte .111 @11 if 'the fglil'@fthe The present device includes any ordin or referred form of lbowlv 1which is ada ted yto e rotated ra idly uponA its longitu 'nal axis.Theto o the bowl isclosedby means of aremovab ecap ,2, which preferabltapers 6o vupwardly and` terminates 1n a :y 'ndrical orown portion 3,havi a centr circular opening 4. Within the owl` there is a feedtube 5,which is provided at its lowerj end with a' or substantially conicalflange or lbase 6 5 6, having a. series of feet. 7, each o which isreceived within a seat or socket 8 in the bot-A ltomof the bowl, so asto prevent looseness of the tube and to'space the lower end thereofslightly above the bottom ofthe bowl.- upper end of the tube is providedwith a reduced terminal 9, iittin the opening 4 in the top of'the cap 2an producing an annu-l larshoulder 10, bearing against the under side ofthe'ca 2, so as to hold the feed-tube snugly 7 5 within t e bowl. Theparts thus described lare' common and Well-known, and therefore may bevaried considerably without affecting the spirit of the presentinvention.

carrying out the present improvements 8o there are provided independentconcentric helical separatingl members 1 1 and 1 2, which are spacedfrom the feed-tube and from one another. The Width of thewhirls' of theinner helix is less than that of the outer helix 9315v and the innerwhirls are set at an angle o about forty-ve degrees to the vertical,While the whirls of the outerfhelixare set at a more acute an le to thevertical. rIt will' here be noted t at each helical spring mem- 9o.

beris practically composed `of a series of superimposed hollow elements,which have substantiall the sha les of rustums. The lower end of t einner elixis secured to the bottom portion of the feed-tube by oneormore 9 5 f fastenings I3, and the out'er helix issecured to thefeed-tube, as at 14, at a point below the attachment of the inner helix.Upon the to s of thetwo helixes there is a perfo- 'rate p at'e 15, andthe feed-tube 5 is threaded roo adjacent Iits upper end, as atception'of aV nut 17, force the plate or v16', for the rewhich isemployed to washer l5 gains't the .helixes, and th`reb compress t 'esame, so as to ybring their W irls mutually into close 105 relation, butout of contact. hEach whirl of .on its inner o r under faceithdfa jacentits ower ed e with f a series of bos tions 19.

helixes.

projections being designed for engagement with the top of the next belowwhir so asto maintain the whirls spaced in order tint the material undertreatment may pass between the whirls. The whirls of the outer helix areprovided with similar internal projec- By preference these projectionsare formed by punching or stamping the man terial of the whirls.

Aside from the helical shape of the separating members it will be notedthat each member is made up of a plurality of superimposed annulartapered elements, the elements of the outer member being wider thanthose of the inner member and also set at more acute angles to thevertical than those of the inner member.

In practice, the parts being assembled as in Fig. 1, the bowl is rotatedupon its longitudinal axis, and whole-milk is fed into the open top ofthe feed-tube 5, from which it escapes between the bottom cf the bowland the bottom edge of the base-flange 6, after which it rises in theannular space between the feed-tube 5 and the bowl, where it issubjected tc tne separating action of the two By reason of thedifference in the specific gravity of the cream and the other milkconstituents the cream gathers around the feed-tube, while the milkcollects in the annular space between the bowl and the outer helix. Aswhole-milk is continued to be fed into the top of the feed-tube 5 thesep-l arated milk and cream risc in separate annular columns in the bowluntil the milk escapes through an opening 20, formed in the bowladjacent the tcp thereof, while the cream rises through the perforateplate 15 and escapes through an opening 21, formed in the cylindricalupper portion of the cap 2.

T o cleanse the de vice, the cap 2 is taken off and the nut 17 removed,after which the fastenings 13 and 14 are removed, which permitsexpansion of the two helixes, so as to give access between the whirlsthereof, as indicated in Fig. 3, whereby all parts of the separatingelements are conveniently accessible to be cleansed, which permits ofthe device being maintained in a sanitary condition. Moreover, as thewhirls of each helix are connected, each separating member may beremoved and replaced as a whole, thereby materially facilitatin theassembling of the apparatus. When t 1e parts are in place,

they are rigidly maintained in their opera#V tive positions in a verysimple and effective manner, while the sever-ei parts may be convementlyremoved for cleansing the same and replacing them when damaged.

n It will here be explained that the nut 17 is independent of the cover2, whereby the f space between the whirls of the helix may be adjustedby manipulating the nut 17 before the feed-tube and the helix areintroduced into the bowl. By this mannerof adjust= ment the helix is infull view, whereby the annular space between the whirls of the helix maybe accurately gcged. When the helix is in the bowl, the spaces betweenthe whirls may be increased by loosening the nut 17 without removing thefeed-tube. As the nut 17 is independent ofthe cover, the .re-

more-.l of the cover does not affect the tension upon the helix.

Herring thus described the invention, what is claimed isl. A centrifugalseparator comprising a bowl, a cover therefor, a feed-tnbe, an elastichelical separating clement embracing the tube, and means carried by thctube and located within the bowl independent of the cover for adjustingthe pitch ofthe helix.

2. A centrifugal separator comprising a bowl, a cover therefor, afeed-tube having en externally-threaded part within the upper portion ofthe bowl an elastic helical separating element embracing the tube` meansfor' fastening one end of the element to the tube, and a n ut on thethreaded portion of the tube lforfrictionally holding op osite end ofthe element and maintaining t ie latter ain-- ally compressed.

3. A centrifugal separator comprising a bowl, a feed-tube rising abovethc top of the bowl, a removable cover carried by the bowl and engagingthe feed-tube to hold thc same in the latter, concentric helicalseparating elements embracing the tube,.1ncan`s for fasteningcorresponding ends ofthe elements to the tube, and an adjustable nica-nscarried by the tube which is independent of the cover and bears againstthe opposite ends of the elements to simultaneously adjust the same andhold them under tension.

e. A centrifugal separator comprising a bowl, a removable covertherefor, concentric separating elements arranged in the bowl and eachcomposed of a single strip of metal wound in the form of a helix, thestrip of the inner element being of smaller cross-section than thatofthe other element and having its convolutions disposed at a less acutean -le to the vertical than the convolutions the outer element, afeed-tube extending through the cover and arranged within the inner cle`ments, and an adjustable device on the feed.- tube independent of thecover for friction-` ally enga ing the elements to hold the latter fixedwith 'respect to the tube and under compression. 1

w "ini A centrifugal separator having `a pair of 'c1-.f entr-ic helicalseparating members, the whirls of one helix being set at a differentangle than those of the other helix.

(j, centrifugal separator having apair cf concentric helical separatingmembers, the whirls of the outer member being set 'at a more acute angleto the vertical than those of the inner member.

7. A centrifugal separator having a. pair of IOO IIO

A. those of the inner member.

9. A'centrifugal separator, havingba pair of concentric helical separat'mem ers, the

m whirlsofthe outer memberreing wider and.

also set at a more acute angle to the yvertical than those of the innermember.

' In testimony that I claim th foregoing as my own I have hereto axed mysignature in the presence of two witnesses.

PETER K. NIELSEN.

Witnesses: i FLonENcn PmnsoN,

`P. P, SWnNsEN. l

